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Thread: Drum 58 micron to 70 (change)
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11-08-2020, 11:26 PM #1
Drum 58 micron to 70 (change)
Can anyone help in locating the correct mesh for a Draco drum, I’m
Running the 58 micron and need to change to a 70 (bigger aperture)as having problems with my pressure cleaning the 58 micron. It’s a problem at the moment as the screen needs jet washing every four days it seems...
1200 gallon pond
Gravity fed
RDF Draco solum 16 drop in
Roto innovations shower
Bottom drain 4’
Thanks in advance
Stephen
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12-08-2020, 12:07 AM #2
Think the best people to speak to are Draco themselves who I'm sure from past threads carry, or can supply various mesh sizes.
Surprised how much you have to clean the mesh.
Mine cleans from the mains and my water pressure is very low yet I've only jet washed it once this year and for no reason other than I had the jet wash out anyway. I've never had any problems with the screen blocking up or even any signs of discoloration.
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12-08-2020, 05:14 AM #3
What's the stocking and the grams of food fed each day? Also is the pond in sunlight?
EDIT: I'm also a 58 micron solum16 user in a hard water area. Have you looked at descaling/de-biofiliming? I use mains water (about 3.2bar) which can cause scaling but reduces biofilm. Mine tends to go nuts if there's an algae bloom but my stocking/feeding regime is quite low for the size of filter.
I've seen on facebook that Draco have offered to supply mesh for OASE customers - so they may offer it.
If you want to DIY it, you could look at the stainless steel mesh (this example is a 77micron woven #200 mesh): https://www.robinsonwirecloth.co.uk/...ture-p53861509 but I suspect Draco would have it cheaper.14000l, my mutts: Chargoi (2010), Doitsu (2022), Tancho (2022), Kujaku (2022), Hi Utusri (2022)
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12-08-2020, 06:55 AM #4
Same as RS. 58 micron. Cleaning wash from mains. No problems. Have nt had the pressure washer out once. I have it set on float switch for 40 minute wash cycle.
Feeding heavy.
Fred
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12-08-2020, 07:25 AM #5
1. Have you popped off the spray nozzles and checked there's no constriction? I've used a tap to control the flow rate before and it does reduce the cleaning "power" leading to more frequent washes.
2. If you have a waterproof camera/phone you could video the portion of the drum under the waste chute and the drum between the water level and the spray bar. This would show if there's any debris stuck rolling at the bottom of the drum reducing filter area. Also the area between the water level and spray bar on a #1 wash rotates through the water and out to that point only during the wash so gives you a snap shot of the waste - check to see if it's got a lot of waste. Have you tried using a number 2 wash for a period and seen if that makes a difference?
You shouldn't have a problem with 1200 gallons (<5000 litres) with a solum 16. As it's gravity fed the sensor isn't going to be bumped by the water turbulence.14000l, my mutts: Chargoi (2010), Doitsu (2022), Tancho (2022), Kujaku (2022), Hi Utusri (2022)
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12-08-2020, 01:40 PM #6
I take it you're not in Sussex or hit a reduction in water pressure caused by the burst water main?
14000l, my mutts: Chargoi (2010), Doitsu (2022), Tancho (2022), Kujaku (2022), Hi Utusri (2022)
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12-08-2020, 01:53 PM #7
best of buying from specialist mesh companies for best prices .
i brought 50 micron from this place below over a year ago, never had to jet wash the mesh and does the job at a good price
https://www.inoxia.co.uk/
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12-08-2020, 02:07 PM #8
Hi Nik, I’ve got 13 koi and I’m feeding less than a kilo a week in fact I’m probably starving the buggers to be honest, I’ve got no huge koi the biggest 4 are about 55 to 60 and the rest are 40 cm and below, I’ve got surface algae but no string weed and I’m
In sunlight half the day till 4 pm. I’m baffled by this happening to me but I do live in London so hard water comes into play, my setup is unusual in that it’s a 4 bay drop in with k1 micro sandwiched between jap mat on a step system. If the screen blocks I lose the back end and the whole thing stops. I may have to put a pump direct to the shower tomorrow. But I’m flabbergasted that is got to jet wash the screen and hope that when we go away For a few days I’ll be worried the filter will stop . Thanks
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12-08-2020, 02:08 PM #9
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12-08-2020, 02:10 PM #10
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12-08-2020, 02:12 PM #11
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12-08-2020, 03:49 PM #12
Hmm that sensor is quite high up.
Most others with gravity fed have their quite low - almost on the cable!
However I can see how that could cause a problem with the next stage - being essentially gravity fed into the bio.
If the sensor is that high - it may trigger quite quickly when the flow rate starts to drop. If you place it down the bottom - what happens? (I assume the water level in the main bios drop too - but does it increase the time between cleans?)14000l, my mutts: Chargoi (2010), Doitsu (2022), Tancho (2022), Kujaku (2022), Hi Utusri (2022)
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12-08-2020, 03:53 PM #13
The problem you're having still seems baffling.
My water GH is 18 out of the tap (the water cleaning the drum). Limescale is a major problem here. Water pressure is borderline the minimum the water company can get away with, in fact they've just been fined by Ofwat and forced to lower bills in my area.
My Draco is cleaning every 5 minutes now in the heat wave, yet my drum mesh is fine.
Maybe if you get a chance you can take a video of it cleaning, just in case something stands out.
Here's mine and the jets sound a lot more powerful in the video than they actually are:
https://www.youtube.com/watch?v=ewUPKIG68MsLast edited by RS2OOO; 12-08-2020 at 03:55 PM.
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12-08-2020, 03:53 PM #14
Just from my experience.
We have an evolve filter with a draco drum (it’s pump fed).
The mesh kept getting dirty so quickly that the draco timer kept timing out - minute it finished cleaning, it would have to start again. Once it timed out, it would just start to dump water out the pond through the overflow.
I ended up changing the mesh to 70 micron, unfortunately that made no difference what so ever....thinking of going up to 100/150 micron.
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12-08-2020, 04:02 PM #15
Draco themselves say the float should be 10 mm below running water level, my one is just about level with the top of the float after a clean. Because I’ve got a stepped 4 bay filter, it works like this... thru drum to jap mat then it goes over to the k1 then thru the wire holes to the last chamber full of jap mat, if the screen gets clogged and the first two chambers starve the last chamber It drains the last chamber and the pump after heating up turns itself off! Disaster !!!! Not sure I ca load a video to here but I’ll try
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12-08-2020, 04:02 PM #16
Think you've hit the nail on the head surrounding the real concern of running these drums.
Cleaning every 5 minutes right now due to the volume of muck being produced, any more frequent and it risks the safety cut-out kicking in. Water flowing at estimated 10,500 lph. If going away I turn flow down to 8,000 lph to extend time between washes and avoid any risks of safety cut-out.
This is only an issue in mid-summer. In winter it goes over 2 hours between cleans.
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12-08-2020, 04:06 PM #17
cleaning at 30 mins intervals now I have cleaned again, I may have the ultimate fix for this next year,,, I’ll take the jap matting out and all the inside struts and fill it with k1, only after my warranty runs out off course lol
It’s still bizarre that it does this as I’ve got at leat 3 bar ??!
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12-08-2020, 04:06 PM #18
here is a thread i started exactly a year ago!
https://www.koiforum.uk/koi-carp-cha...lter-help.html
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12-08-2020, 04:14 PM #19
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12-08-2020, 05:19 PM #20
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freddyboy Thanked / Liked this Post
Best plants to remove Nitrate
pug has a very impressive veg filter on his pond, have a look at some of his his youtube videos....